How hard is it to put on a serpentine belt

easy.go get new belt,also rent the serpentine belt tool,AZ part #27115.$30.00.you get money back when you return it.look at diagram on fan shroud,release tension on tensioner with tool,slide belt off,release tensioner slowly.route new belt on all pulleys,leaving tensioner untill last.move tensioner back with tool,put belt around it and release tensioner slowly.make sure belt is lined up on all pulleys correctly.